I use my HD598 directly out of my Macbook Pro, and they are phenomenal (when used with FLAC files in Audirvana Plus)   I'm just about to order the Magni 2 Uber / Modi 2 Uber.   Ill let ya know the difference when I get em :)

Magni 2 / Modi 2 I know the Modi 2 Uber is worth the upgrade, but the Magni really isn't.. The only reason I'd be getting it would be to match the Modi... Thoughts?

Well, Schiit has said that if you don't need preamp outputs, there is no need to get the Uber.. Pathetically, since I'm getting the Modi 2 Uber, I think I'll still get the Magni 2 Uber, so that they match.   Isn’t this just a trick to get us to buy a Magni Uber for $50 more? Um, no. If you...

What would be a significant, noticeable, upgrade from the HD598? I really like the HD598..   HD600 vs HD650..   Significantly better than the HD598?   how?

You're using iTunes with your 598? If you aren't using lossless files (.aiff) then what's the point? My entire iPod is .aiff files, but I would still don't use it with my HD598s..   I would also recommend the E17, for portability. 

    I'm in the same boat as you. I was comparing those NFB models for awhile too, but decided to order the Schiit Magi 2 Uber / Modi 2 Uber instead.   I'm waiting for the shipment, but I feel it was the right good choice for my HD598s   The NFB-15 has 2 WM8741s in it, while the NFB-11...

I'm conflicted.    I was dead set on the Vali, but now I just don't know.   I might have to just buy both (Magni 2 Uber, Vali) and return the one I like less.

I've heard from numerous sources that the O2/ODAC is very neurtral and "cold" sounding compared to a combo like the magni2/modi2 or the vali/modi2.   Can anyone attest to this?

I'm going to just but a Schiit Vali / Modi 2 Uber and call it a day

I've decided on the Vali / Modi 2 Uber

What's better?   Dual WM8741s (NFB-15)   Or One ES9018 (NFB-3)

Can someone tell me how to figure out what the DAC is in my MacBook Pro (Retina, 15-inch, Early 2013)? I'm having trouble... I've gone through all of my Mac's settings and preferences that I am aware of, and no dice... Thanks!

My entire reason for getting an Amp/DAC was solely to replace the DAC in my Macbook.   Does anyone know what DAC is IN a Macbook Pro (Retina, 15-inch, Early 2013)?

This is probably correct. It's not the phones burning in, it's your ears getting used to them and adjusting to them. It took me about a week I think.

Can someone tell me how to figure out what the DAC is in my MacBook Pro (Retina, 15-inch, Early 2013)? I'm having trouble...   I've gone through all of my Mac's settings and preferences that I am aware of, and no dice...   Thanks!